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Updated: Jun 14, 2026
10:39
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
Summary
Aberrations from a perfect grating rhomb beam sampler were analyzed for diverging beams. Results show astigmatism and higher-order aberrations are introduced, but no tilt.
Area of Science:
- Optics
- Beam Sampling Technology
Background:
- Grating rhomb beam samplers are used in optical systems.
- Understanding aberrations is crucial for optical system design.
Purpose of the Study:
- To calculate aberrations introduced by a perfect grating rhomb beam sampler.
- To analyze these aberrations for a diverging beam in the geometric optics limit.
Main Methods:
- Theoretical calculation of aberrations.
- Analysis within the geometric optics approximation.
Main Results:
- A perfect grating rhomb beam sampler does not introduce tilt aberrations for a diverging beam.
- Astigmatism and higher-order aberrations are identified as key aberrations introduced by the rhomb.
Conclusions:
- The perfect grating rhomb beam sampler is suitable for applications where beam tilt is undesirable.
- The presence of astigmatism and higher-order aberrations must be considered in optical designs utilizing this beam sampler.
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